{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "The human urothelial cell line UROtsa expresses mRNA for both B1 and B2 subtypes of bradykinin receptors , as determined by real - time PCR ."}
{"Chemical": ["bradykinin"]}